fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/astro/dist/assets/fonts/infra/fs-font-file-content-resolver.d.ts

@@ -0,0 +1,10 @@
+import type { FontFileContentResolver } from '../definitions.js';
+type ReadFileSync = (path: string) => string;
+export declare class FsFontFileContentResolver implements FontFileContentResolver {
+    #private;
+    constructor({ readFileSync }: {
+        readFileSync: ReadFileSync;
+    });
+    resolve(url: string): string;
+}
+export {};